| Clinical trials are in progress and research is ongoing for developing a safe and efficacious vaccine against the disease. |
| There may be occasions, for instance, when a dose of old-fashioned common sense can be as efficacious as a more sophisticated remedy. |
| A small comparison study demonstrated that these two drugs are equally efficacious. |
| History and theory show that the use of naked government aggression is not a moral or efficacious way of dealing with poverty. |
| Second, proving that a supposedly life extending drug will be efficacious is an extremely difficult task. |
| When contemporary arts are produced for an international market, they can still be efficacious. |
